Chuck



1... A. EDEALVMANN March 30 1926.

CHUCK Filed Oct. 4, 1922 2 Sheets-Sheet l will! Patented M Lotus A; EDELMANN, or sr. LOUIS; MISSOURI; Assronon j'ro UmooMo'ronrRonr-rcrs i CORPORATION, orsr. LOUIS; MIssoURL noonronnrronor-MIssoUmf CHUCK.

Application filed October 4, 192 2, Serial: No. 592,306.-

To'allcuhom i tmw concern: V 1 a Beit known that I, LOUIsA. EDELMANN,

' citizen of the United States, residing at holding devices 7 and, more part cularly, to a *certa'in' new and useful lmprovernent in "the city of St. Louis, State of Missouri, have invented a certain newand useful Improve ment in Chucks, of which the following 1s a specification, reference being had to the accompanying drawings, form ng a part thereof; 7 v V V Thi's'invention relates generally to work- Work-holding devices of the class common ly.'known as chucks. V I Thei principal object of my present 1nvention is to provide an eiiicient chuck of relatively implefand inexpensive fornrand construction adapted especiallyjfor the rigid holding or gripping of tubular objectsduring the machining, grinding,'or other operations upon their outer surface. v

Other-objects of my present invent on areto provide a chuck of'the kind stated which may be readily installed upon the 'turningor? other machine, which may be j convenlently and economically repaired and its parts repaced or renewed when'necessary' [or required through wear, breakage',

or other cause; which inay be accurately adjusted with facility tov accommodate tubular work of different lengths and diameters, 'and'which is actuatablefwith ease rapidity,

and precision." r

- With the. above and also other objectsi-n view, my present invention residesi-n the novel features o f iorln, construction ar 'rangenient, and combination 01E parts hereinafter described :and afterwardspointed out inthe-c1aims; v I In the accompanying dr'aw1ngs 7 Figure 1 is a longitudinal sectional View 'of'a chuck-embodying my invention;

Figurefiiisa detail sectional view of'the chuck taken approximately on the line 22, Figurel; L v Figure 3' is a transverse sectional View of the chuck on approximately the. line 3+3,

Figure 1; W i Figure 4 is a longitudinal sectional view of the chuck taken approximately vonf'its vertical centerjline,-'the jaws ot the chuck-being in work receiving-position and illus- V trated in connection with a feeding-device;

and i, i Figure 5 is a similar view of the "chuck Referringnow more indetail andby reitere ice character's,',to the accompanying drawings, which illustrate"a preferred 'eIIibodiment of my invention, 1 indicates theyloody of the device; which is preferably in. theform of a cylindrical steel bar forrod of suitable diameter having a spindle-bore 2; and counter-bored atone end, Iajs'at 3, and internally threaded, as at l, iiorfcon-venient' attachment upon "the turning anachinefasi Willfbe understood; At its other orro pposite 7 end, thebar orbody 1 is formed around itsv bore 2 with 'what maybedescribednas an annular chamber 5 and .is also internally fthreaded, as-at 6; and substantially forming a part, of and removably fittediin the body at its threaded end 6,is ajring 7, of. a steel or other suitable hard;,n1etal, upon; the "forwardly presented facefi of 'which ithef iwirik may be concentrically ;or ecc.entrically e r chamber 5i oi:', bar orbody 1, an annular retaining member comprising; a ring 9 hav1ng"a conc'aved face '10 and second ring 11 having a circumferential groovefl?) Disposed for sliding movement giagthe "upon its outer perimeter, thejringsjg and 111; 'andthell COr'QPQrating faces'lo 12 ,p,ro-'- viding an annularpivo'tlorijournaliseat for it the correspondingly, ar'cuated rear ends 13 f p pra1' fiy fb su i bly ng ea s ipo rate or independentshanks' orstems .14; each a provided at its free outer for, forward end with a header jaw' proper 15.. Q As 'best Jseen' propenbeing disposed in an annular series or engaging co-opera'ti'onat their vrearvvarldly groove '12 in theretainingsring ll .is Iof greater; diameter than @the other or inner -wallj thereof, whereby the several'jaws l5 have certain freedom for independent swing- "able or pivotal moveinentrelatively to the ring 7; and to facilitate assemblage of the 10c .gfor war'dly of,"and;adaptedljfor workliolding i presented, faces 16 ,Wa11,gt 11@ bodyor n g 7.v As best seen in; Figure2,-the ,outer wall of a several jaws 15 at their shank-ends 13 with the.rings 9 and 11 and to-also facilitate proper independent swingable movement of the several jaws 15, the several jaw-shanks 14 aresuitably equidistantly spaced at their 7 pivot or journal ends 13 by means of lateral stubs or pins 17, the rings 9 and 11 being in due course rigidly fastened together by screws or the like 18 and the jaws thereby maintained in proper swingable relation to one another and to the ring 7.

' Disposed in chamber'5 rearwardly of ring "I15 relativelyto and away from the ring 7,-

9, is a coiled expansion spring or the like 19 adapted to yieldingly maintain the series of jaws 15 in forwardly spaced relation from the ring 7; and fitted in the bar 1 are op- V positely disposed screws 20 having inwardly presented protruding pins 21 adapted for engagement with the ring ll to limit the; rforwardvsliding movement in chamber 5 of the rings 9 and 11 and consequently also the swinging movement of the series of aws I ures 1,4, and 5.

Forming part of the forwardly presented face of each head or jaw proper 15, is a beveled or cam portion'23, and disposed forwardly of the series of jaws 15 and having a rearwardly presented beveled or cam annular face 24 adapted for co-operation with the several cam-faces 23 of the jaws15,is a socalled jaw-spreading or cam-member 25 having a shank 26 extendingrearwardly in bore 2 of bar 1 and having'threaded connection or attachment,;as' at 27 with the usual shift able draw-rod 28 0f, the turning-machine.

I have heretofore employedmy new chuck in the machining and turning of engine piston or packing-rings; For such use, the

chuck is especially adapted,land, as an application of thechuck, I have illustrated the same in that relation, showing the chuck I prefer to employ to not only obviate relatively-slow and unsafe hand-feeding, but to also-effect rapidity of feeding with safety to the operator. Such feeding device coinprises a hopper or substantially bell-shaped body 29 adapted for attachment at its shank 30 to and upon ashiftable shaft ofthe turning-machine, not shown, the axis of body 29 being in longitudinal alignment or registration with the axes of jaw-spreader 25 and ring 7. Fixed to and upon the peripheral edge of body 29 and having a diameter somewhat greater than the vdiameter of ring 7, as

' seen in Figures t and 5,'is a feeding-ring 31.

In'operation, assume the annular series of 'jaws 15' and their co-operating spreadingmember 25 to be in so-called normal or nonwork engaging position or in the position jaw-spreader 25 are, in turn, shifted against the tension of spring 19, when, under the cam-engagement between the member 25 and the several jaws15 at their co-operating or engaging faces 24 and 23 the several jaws 15 are radially hingedly or pivota'lly expanded against the tension of their contracting spring 22 into the position thereof illustrated in Figures 1 and 5 to engagethe'ring 32-at theirfaces 16, the ring 32, to be, ma-

chined being thereby firmly and rigidly gripped and held by and between'the ring I 7 and the series of'jaws15'. Thefeedingbell 29 and its feeding-ring 30 are nowoppositely shifted or retracted to normal position to expose the outer circumference of the ,ring 32 for machining or other desired operation; Operations upon the ring 32 being completed, bar 28 and its attached jaw spreading member 25 are likewise oppositely or forwardly shifted, whereupon, under the tension of springs 19 and 22, theseries of jaws 15 are yieldingly collapsed or actuated to non-work engaging or normal'position or again into the position thereof illustrated in full lines in Figure 4 and in dotted lines in I Figure 1, the finished ring 32 being released,

and suitably ejected from the machine. I

My new chuck in'its several parts'may be sequently'also its attached cam-member or economically produced, is applicable for use 7 in connection with, and may be conveniently installed upon practicallyall forms or types of turning" machines, and is exceedingly precise, accurate, and. efficient in the I I I I I performance of its vintended functions, and in connection with a feeding devlce which travel of rings 9-11 and consequently also adjustment in the swingable movement of the severaljaws 15 may be effected to accommodate rings 32 or other work of different lengthsand diameters. It/will also be observed that, following the 1 threaded dle 28 of the machine, the location and shift-1 able movement of member relatively to the jaws 15 may be likewise conveniently ad- I 'justed, the cam-member shank 26 being split 25 in such adjusted position being locked to spindle 28 by means ofa bolt 34: disposed longitudinally through the shank 26 of mem ber 25 and engaging a: shank-expanding nut 35 disposed for the purpose within the splitend ofshank 26, as best seen in Figures 1 and 4. It will further be observed that, following the described construction of the chuck andits several parts, repairs and replacements'of the various parts of the chuck may be made with facility without necessitating removal of the chuck as a whole from the machine. v

It will be readily understood that changes in the size, form, construction, arrangement, and combination of the variousparts ofmy new chuck may be made and substituted for those .herein shown and described without departing from the nature and principle of my invention. 7 V

Having thus described myinvention, what I claim and desire to secure by Letters Patent is: i 1. A chuck including, in combination, an annular work-engaging body, a plurality of swingable jaws, each jaw comprising a shank and an outwardly projecting head having opposite faces rear'wardly and forwardly presented relatively to thevbody, said jaws being disposed normally in a yieldingly'contracted annular series with their heads presented forwardly, of the body and beinglslids able relatively to and swingable towards the" body,, and meansadapted for engagement with the jaws at the forwardly presented faces of theirjh'eads for slidably and radially expanding the jaws to engage the work between the body'and the rearwa'rdly presented faces of their heads. a

2 A chuck including, in combination, an annular body, a plurality of'swingable jaws, each jaw comprising a shank and an outwardly projecting head havingopposite faces rearwardly, and forwardly'presented relatively to the body, said jaws'being disposed normally in a yieldingly contracted annular series with their heads presented forwardly of the body and being yieldingly slidable relatively to and I swingable towards the body, and means comprising an axially I shiftable member adapted for engagement with the jaws at the forwardly presented faces of their heads for slidably and radially expanding'the jaws to engage the work between the body and the rearwardly presented faces of their heads. v

3. A chuck including, in combination, an

for locking said annular body, a ring-shaped member yieldingly axially slidable in the body, a plurality of swingable jaws, each jaw comprising a shank pivoted at an end upon said member and ha-Vingan outwardly project- .ing headat its opposite endprovided with at its threaded end, as at 33, and the member opposite faces rearwar'dly and forwardly presented relatively to the body, said jaws being disposed normally in a yieldingly con tracted annular series with their headsipresented forwardly of the body,- and'means comprising an axially shiftable member adapted for engagement with the jaws at the forwardly presented faces of their heads for slidably and radially expanding the jaws to engage the work between the body and the rear-wardly presented faces of their heads.

4. A chuck including, in combination, an annular body, a ring-shaped member yieldingly axially slidable in the body, a plurality of swingable jaws, each jawcomprising a shank pivoted at an end upon said member and having an outwardly pro ecting head at its opposite end provided with opposite faces rearwardly and forwardly presented relatively to the body, said jaws being disposed normally in a yieldingly contracted annular series with their heads presented forwardly of the body,.means comprising an axially shiftable member adapted for engagement with the jawsat the forwardly presented faces of their heads for slidably and radially expanding thejaws to engage the work between the body and the rearwardly presented faces of their headsyand means for adjustably varying the movement of the jaws relatively to thebody toaccommodate work of different thickness.

5. A chuckincluding, in combination, an annular body, a ringsh'aped'- member yieldingly axiallyslidable the body, a plur-ality'of swingable" jaws, each jaw compris-' ing ashank pivoted at an end upon said member and having an outwardly projecting head at its opposite end provided with opposite faces rearwardly and forwardly presented relatively to thebody, said jaws being disposed'normally in a yieldingly contracted annular series with their heads presented forwardly of the body, and means for slidably and radially expandingthejaws to engage the work between the body and the rearwardly presented faces of their posed within and shiftable axially relatively heads, said means comprising a spindle disengagement with the forwardly presented I A faces of the heads of the aws, and means member at its shank to the spindle. i

In testimony whereof, have signed my name to this specification.

LOUIS A. EDELMANN. 

